Carbureter for gas-engines.



PATENTED MAY 12, 1903.

T. B. JEFFERY. OARBURETER FOR GAS ENGINES.

APPLICATION F ILED MAR. 21. 1900.

N0 MODEL.

UNITED STATES Patented May 12, 1903.

PATENT OFFICE.

THOMAS B. JEFFERY, 0 oIIIoAeo, ILLINOIS.

CARBURETER FOR GAS-ENGINES.

SPECIFICATION formingpart of Letters Patent No. 727,635, dated May 12, 1903. Application filed March 21, 1.900% serial No. 9,53f1. ,(No model.)

which the following is a specification, refer;

ence being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide improved means for so regulating the proportions of hydrocarbon vapor and air which enter into the charge going into the cylinder at each action of the engine as to insure the- 1 5 proper and most effective quality for the purpose of explosion, whatever he the quantity of each charge and however the frequency of the explosions may vary. The method which I adopt for obtaining reliable proportions of the air andthe hydrocarbon vapor consists of taking at each action a determined quantity of liquid hydrocarbon for vaporizing and mixture with air as distinguished from taking or attempting to take a determined quantity of hydrocarbon vapor for mixture with the air. this purpose is shown in the drawings, of which- Figure 1 is an end elevation of aportion of a gas-enginehaving my improved carburetor, showing the latter with a portion of its case broken away to disclose the interior. Fig. 2 is a section of the carbureter at the line 2 2 on Fig. 1. Fig. 3 is a detail elevation of the swivel-joint and cut-ofi' in thegas-supply pipe leading to the engine.

In the drawings 1- have shown a two-cylinder engine, the gas-supply pipe A having two branches .Aand A which lead to said cylinders, respectively, the gas-supply being con trolled or cut off by a simple valve or turncock at a in the swivel-joint A3, (seen in Fig. 3, and whose structure is obvious without particulardescription,) said joint being provided in order to permit the'mouthpiece B of the gas-supply pipe to be movable at its intake end, as hereinafter described.

0 is a shaft deriving motion from the engine crank-shaft and communicating motion to the vertical shaft D by means of beveled gears G D on said shafts, respectively.

- D on the shaft D is a worm which com- The apparatus which I employ for m unicates rotarymotion to the gear E, mount= ed on the carbu refer-case H and meshing with the pinion F on. the-shaft f, which is journaled in said case. Within the case H, mounted on the shaft f, is a skeleton-wheel G, comprising spokes G G, 850., and two annular flanges G G concentric about the shaft f and having extending over the annular area which they bound an annular web or screen J,

which is preferably made'of'fine-meshed wirecloth secured in any suitable manner, so that it is revolvedwith the wheel. The case H is provided with suitable meaus,as the pipe h,for supplying it 'With liquid for furnishing hydrocarbon gas, and into this liquid the wheel as it revolves causes the Web or screen J to pass, so that its interstices are filled with a film of the liquid whichit carries up as it rises out of the latter in its revolution. The web J stands quite close to the vertical Wall or face of the chamberSH, and through said wall near sary, but the nearest approach thereto which will avoid wiping the liquid'off the surface H of the-web by contact therewith being desirable. The aperture H is elongated in the direction in whichthe mouth of the mouthpiece B moves as said mouthpiece oscillates about the swivel-joint, and the said. mouthpiece has a flange B, which extends in the plane of the outer surface of the case H, so as to cover any portion of the aperture which is unoccupied by the intruding end of the mouthpiece. It .willbe seen that thead-j ustment of the mouthpiece may be made such as to cause it to abut in proximity to and be obstructed by the web J over more or less of its opening and that more or less of said opening may extend outside the case and be exposed freely to the outer air, and also it will be seen that the portion of said opening which ICO may extend beyond the margin of the screen over the space which is left between the outer flange G and the inner surface of the inner wall of the case may likewise draw freely upon the air which may be in the case and which is admitted freely thereto through apertures K at any convenient point. The total cross-secti0nal area of the intake of the mouthpiece beinguniform, the portion of that area which is obstructed by the screen and the portion which is unobstructed and open freely to the air is thus varied as the monthpiece is adjusted in one direction or the other. The portion of the screen which is lapped by the intake of the pipe containing substantially uniform quantity of liquid hydrocarbon in its capillary or comparatively small interstices thus affords the quantity of liquid hydrocarbon proportionate to the area thus exposed, and in like manner the amount of airdrawn in through the unobstructed portion of the intake will vary with the area of that unobstructed portion.

For the purpose of adjusting the mouthpiece to vary the ratio of its obstructed and unobstructed portions I provide the adjust ing-screw L, screwed through the lug H of the bracket H which extends up from the case H, the end of said screw being connected swivelwise with the mouthpiece at the lug B on the latter.

I do not limit myself to the use of the rotating annular disk of woven-wire cloth J shown nor to any particular means of giving motion to the element which serves the purpose which is served by this woven-wire cloth in the structure illustrated, though the particular features of construction herein shown are believed to have specific advantages over others which might be employed; but any moving or traveling Web or screen adapted to take up or hold liquid hydrocarbon as it passes through it, arranged in connection with means for passing it thus through the hydrocarbon and exposing a determined portion of its area to a current of air forced or drawn through it, so as to take out the liquid hydrocarbon thus carried by it at the portion thus exposed at each action of the engine and whether such air-current is induced by suction from the engine orotherwise, would be within the scope of my invention.

I claim 1. In agas-engine,a capillary web or screen; a chamber in which it is contained; means for moistening such web or screen With'the liquid to be vaporized; a duct leading to the engine-cylinder having an intake-mouth abutting on the moistened web or screen within the chamber, whereby such month is obstructed proportionately to the extent of the moistened web or screen over it; said duct having also free intake for atmospheric air outside the chamber.

2. In a gas-engine,a capillary web orscreen; a chamber in which it is contained; means for moistening such web or screen with the liquid to be vaporized; a duct leading to the engine-cylinder having an intake-mouth abutting on the moistened screen within the chamber, whereby said mouth is obstructed proportionately to the extent of the moistened web or screen over it, said duct having in addition to such obstructed portion of itsintake a free intake for atmospheric air outside the chamber, and means for varying at will the area of such free air-intake.

3. In a gas-engine, a carbureter comprising a capillary web or screen; means for moving it; means located on its path of movement for saturating it as it passes; a duct leading to the engine-cylinder; a mouthpiece for such duct having its intake partly obstructed by the screen and partly freely open to atmospheric air, said mouthpiece being movable to vary the relation of the obstructed and unobstructed portion of its intake.

4. In a gas-engine, a liquid-holding chamber; a capillary web or screen inclosed within the chamber, and means for causing it to travel down into and up out of the liquid therein; a duct leading to the engine-cylinder, having an intake-mouth abutting on the moistened web or screen within the chamber, whereby such month is obstructed proportionately to the extent of the moistened web or screen over it, said duct having also free intake for atmospheric air outside the chamber.

5. In a gas-engine, a liquid-holding chamber; a capillary web or screen inclosed within the chamber, and means for causing it to travel down into and up out of the liquid therein to become moistened with said liquid; a duct leading to the engine-cylinder having an intake-mouth abutting on the moistened web or screen within the chamber, whereby said mouth is obstructed proportionately to the extent of the moistened web or screen over it; said duct having, in addition to such obstructed portion of its intake, a free in take for atmospheric air outside the chamber, and means for varying at will the area of such air-intake.

6. In a gas-engine, a liquid-holding chamber, a capillary web or screen inclosed within the chamber; means for causing it to travel down into and up out of the liquid therein to become moistened thereby; a duct leading to the engine-cylinder, having an intake-mouth abutting on the moistened web or screen within the chamber, whereby said mouth is obstructed proportionately to the extent of the moistened web or screen over it, said duct having, in addition to such obstructed portion of its intake, a free intake for atmospheric air outside the chamber, and being movable bodily to vary the area of said mouthpiece obstructed by the screen and the area exposed as free intake for the atmospheric air.

7. In a gas-engine,a capillary Web or screen, a chamber in which it is contained; means for moistening the screen with the liquid to be vaporized, the chamber-wall having an aperture facing the-screen and extending to the margin or peripheral wall of the chamber; a duct leading to the engine-cylinder, and a mouthpiece for the same which extends to said aperture and is movable at the month end to cause said mouth to lap more or less liquid; a capillary web or screen within such chamber, and means for revolving it therein to pass it through the carbureting liquid, said chamber having aportion of its wall provided with an aperture whose margin is in close proximity to the surface of the screen moving past it; a duct leading to the enginecylinder provided with a mouthpiece having its intake at said aperture, said mouthpiece being movable to vary the proportion of its intake which laps on the aperture, and having a flange which covers the remainder of the aperture. l

9. In a gas-engine a carbureter, comprising a chamber for containing a carbureting liquid, a capillary web or screen in the chamber, and means for revolving it to pass it through the liquid, said chamber having a portion of its wall provided with an aperture whose margin is located close to the surface 7 I of the web moving past it; a duct leading to the engine-cylinder, havinga movable mouthpiece whose intake is arranged to lap partly onto said aperture and partly to extend beyond the same and be open freely to the air; said mouthpiece having a flange which covers so much of the aperture as is not lapped by said intake.

10. In a gas-engine, a carburetor compris ing a capillary web or screen; a chamber in which it is located, arranged to contain liquid for carbureting; a train by which the Web or screen is moved in definite time relation to the engine to cause it to pass into and out of the liquid; a duct by which the engine derives the gas-supply; and a mouthpiece for such duct, having the intake in close proximity to the web or screen; meansfor adj usting the mouthpiece to cause the intake to lap more or less on the liquid-saturated surface of the screen.

In witness whereof I have hereunto set my hand, at Chicago, Illinois, in the presence of two witnesses, this 19th day of March, A. D;

In presence 0'f- JERRY W. DE CoN, CHARLES T. JEFFERY. 

